JPH0358036B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rod magazine device for a boring machine, which stores and supplies drill rods, and retrieves drill rods that have been drilled and stores them again.

An example of a conventional rod magazine device is shown in FIGS. 1 to 4, in which the magazine 1 is swung back and forth around a hanger shaft 7 attached to a guide frame 8 as shown in FIG. The rod is set in the operating position (attachment/detachment position) and the retracted position indicated by the solid line in the rear direction. Magazine 1 is the second
As shown in Fig. 3, six drill rods 9 are stored and rotated by 60 degrees, and each rod 9 is positioned on the axis of the bore hole (not shown) at the above-mentioned rod attachment/detachment position. The rods are set one after another, and the rod chuck 10a of the upper power swivel 10 is screwed and connected to the lower end of the parent rod (not shown) held by the rod chuck 10a. The above parent rod is inserted into the power swivel 10's spendle (not shown),
It is a short boring rod with both ends protruding from the spindle. The conventional rod magazine device described above had the following drawbacks. When recovering the drill rods 9 after drilling a hole to a desired depth in the ground, the uppermost drill rod 9 is located above the drill table 31, and the upper flat part 9a of the next drill rod is placed above the drill table 31. The power swivel 10 is raised until it is approximately aligned with a clamp (not shown) carried by the drill pipe, and the power swivel 1
0 is activated, the screw between the two drill pipes is twisted in the opposite direction, the connection is removed, and the power swivel 10 is then raised to remove the lower end of the uppermost drill rod connected to it from the magazine 1. Place it slightly above the sheet board 2. While the uppermost drill rod 9 is held in this position, the magazine 1 is swung from the retracted position to the attachment/detachment position, the drill rod is loaded into the magazine 1, and the drill rod is lowered so that its lower flat part 9b is attached to the sheet plate 2. It fits into the through hole 5 of. Thereafter, the power swivel 10 is activated to reverse rotation, and the uppermost drill rod 9 is rotated in the opposite direction.
The upper end of the uppermost drill rod is screwed and connected to the lower end of a parent rod (not shown) inserted through the spindle of the power swivel (screw breakout). In this connected state, the screw is strongly tightened during excavation work, so the threaded portion cannot be removed unless it is twisted in the opposite direction with a considerably strong force. Therefore, when the above-mentioned power swivel 10 is operated to cause a screw breakout between the drill rod 9 and the parent rod, the entire magazine 1 receives the reaction force of the breakout that is directly applied to the through hole 5 of the sheet plate 2. Therefore, it is necessary to have a structure with high rigidity in consideration of torque resistance, and if the strength is weak, it may cause a failure. In the above-mentioned rod magazine device, as shown in FIG.
a. A specially shaped drill rod with a lower flat portion 9b is required, and a normal drill rod cannot be used. It cannot be used by adding two or more pieces together to make one piece of the specified length. In other words, when removing the connection between the parent rod and the uppermost drill rod, the screws between the other added drill rods will loosen, so it is not possible to add two or more rods and use them as one length. It's impossible.

FIG. 5 shows another example of a conventional rod magazine device, in which a shows a state in which the drill rod 9 is loaded onto the magazine 1, and b shows a state in which the drill rod 9 is fully loaded, with the lower hexagonal part 9
In the state b where c is fitted into the recessed hole of the sheet plate 2, the screw breakout of the connecting portion between the parent rod of the power swivel and the drill rod 9 is performed. This case also has the same drawbacks as the example shown in FIGS. 1 to 4 described above.

The present invention was made in order to improve the above-mentioned drawbacks, and it is possible to securely hold the drill rod near both ends without requiring a specially shaped rod, and so that the reaction force at the time of screw breakout is not applied to the magazine. It is an object of the present invention to provide a rod magazine device for a boring machine that can handle and store drill pipes.

Therefore, in the present invention, an upper clamp that reciprocates with the power swivel is installed below the rod chuck at the bottom of the power swivel that moves up and down along the guide frame, and the magazine sheet plate has a circular concave hole corresponding to the lower end of the drill pipe. A C-shaped insertion hole in the latch plate is formed by an opening having a width slightly larger than the outer diameter of the drill rod, and an arc that abuts against the outer circumference of the rod to position the rod, A guide ring having an opening along a part thereof and equipped with a hydraulic cylinder that operates a shoe that presses or releases the outside of the drill rod located in the opening is configured to be swingable together with the latch plate, and the magazine is When the drill rod is swung, the drill rod positioned at the opening of the guide ring is aligned with the rod attachment/detachment position, that is, with the axis of the borehole.

A detailed description will be given below based on the accompanying drawings. 6th
Figure A is a front view of a crawler tower-mounted boring machine having a rod magazine device showing one embodiment of the present invention, Figure 6B is a side view of the same, Figure 6C is a plan view of the same, and Figure 7 is a diagram of the present invention. 8 is a sectional view taken along line A-A in FIG. 7, FIG. 9 is a sectional view taken along line BB in FIG. 7, and FIG.
FIG. 0 is a longitudinal cross-sectional view of a rod magazine device showing an embodiment of the present invention, and FIGS. 11 and 12 are procedure diagrams for adding and recovering rods in the rod magazine device showing an embodiment of the present invention.

In the figures, parts corresponding to those in the conventional example are given the same reference numerals, and explanations of those parts will be omitted.

As shown in Figure 6, reference numeral 8 denotes a guide frame, which is laid down nearly horizontally when traveling, as shown by the chain line, but after moving to the drilling site, the guide frame 8 is raised to a vertical position during drilling work. The outrigger 15 secures that position. The magazine 1 is configured to swing around the hanger shaft 7 between an operating position in the forward direction shown by a chain line and a retracted position in the rear direction shown by a solid line, as shown in FIG. 4 is fixed to the side of the guide frame 8,
This is a retainer that prevents the magazine 1 from being pulled out when it is tipped over while traveling. A lower clamp 17 is attached to the lower end of the guide frame 8, and the power swivel 10 is attached to a slide table 18 that can reciprocate along the guide frame 8.
The clamp 16, which is a feature of the present invention and which clamps the drill rod 9, is attached to the slide table 18 with a slight distance from the rod chuck 10a, which is opened and closed by hydraulic pressure. A magazine shaft 6 has a seat plate 2 fixed to its lower end and a latch plate 3 fixed to its upper end, and is rotated by a hydraulic motor 25 (FIG. 7). power swivel 1
The drill rod 9 is reciprocated along the guide frame 8 via a chain 8a by a hydraulic motor 19 attached to the upper end of the guide frame 8, thereby performing drilling and extraction, and loading and unloading of the drill rod 9 into the magazine 1. . A hydraulic motor 20 drives the power swivel 10 to rotate its spindle (not shown) and the rod chuck 10a. Reference numeral 22 denotes a hose guide that holds a hydraulic hose 22b connected to a hydraulic motor 20, a hydraulic cylinder (not shown), etc., which moves up and down together with the slide table 18 when it moves up and down along the guide frame 8, so that it does not slacken. So, crawler 1
The hydraulic oil discharged from the hydraulic pump of the power unit 11 mounted on the valve unit 1
2. Through the control unit 13, the middle portions of the plurality of hydraulic hoses 22b that supply oil to the hydraulic actuators that move up and down with the slide table 18 are fixed to a fixed point 22a in the middle of the guide frame, and from this point on, the guide frame The hose guide 22 moves up and down along the 8 sides to take up excess slack. Figure 7 ~ 1st
As shown in Figure 0, the magazine 1 includes a disc-shaped sheet plate 2 at its lower end for holding the lower end of a drill rod 9, and a latch plate at its upper end for holding the drill rod 9 in a removable manner through which the drill rod 9 is inserted. 3
and the keys 6a and 6 on the magazine shaft 6, respectively.
In the seat plate 2, six circular recessed holes 2a into which the outer diameter of the lower end of the drill rod 9 is fitted are arranged on a concentric circle with the magazine shaft 6 as the axis. , a C-shaped insertion hole 3c having a center at the same relative position as the recessed hole 2a in the sheet plate 2 and formed by an open part 3e opening toward the periphery and a semicircular arc 3d on which the drill pipe comes into contact is 6. Placed in places. The hanger shaft 7 is rotatably supported at its lower and upper ends by plain bearings 7a and 7b at the tips of a lower bracket 24 and an upper bracket 23, which are respectively attached to the sides of the guide frame 8 with bolts. downwards,
The keys 7c and 7d are inserted upwardly through the guide ring 3b and inserted into the magazine support drive section 21, respectively.
It's stopped. The magazine 1 has radial bearings 21e, 21e on the magazine support drive section 21.
The pinion 21 is rotatably installed via a thrust bearing 21f, and is driven by a hydraulic motor 25.
a, it is rotated by driving the magazine shaft 6 via the gear 21b. This rotation causes the six drill rods 9 to be set one after another on the axis of the drilled hole. In the case of this figure, the rotation and stop positioning of the magazine shaft 6 are performed by a combination of six keys 21c and one notch 21d arranged on the lower surface of the gear 21b, and the seat plate 2 can be rotated clockwise continuously. However, when turning to the left, a stopper is applied by the notch 21d every 60 degrees, and if you turn to the right and then turn left a little (within 60 degrees) from the specified position, it will automatically turn. Stops at the centered position. The hanger shaft 7 is rotated when the rod 26a end of the hydraulic cylinder 26 attached to the lower bracket 24 pushes or pulls the bracket 26e connected to the pin 26b on the lower surface of the magazine drive section 21. The magazine drive unit 21, the magazine 1, and the guide ring 3b connected to the hanger shaft 7 are arranged in the front and rear directions (the solid line indicates the front position, and the chain line indicates the rear position).
swing to. As shown in FIG. 9, the guide ring 3b has an opening 3f for one drill rod in a part along the outer circumference of the latch plate, and a hydraulic cylinder 28 is pivotally supported by a pin on the outside of the guide ring 3b. A shoe 29a of the centering arm 29 connected to the piston rod 28a passes through the opening 3f to press or release the outside of the drill rod 9 located in the opening 3f. The drill rod 9 located in the opening 3f is constructed so that when the magazine 1 swings forward, the rod attachment/detachment position is aligned with the axis of the borehole, and the drill rod 9 is located at the position indicated by the solid line in Fig. 9. The axis of the drill pipe 9 in the open part 3f is
A spindle (not shown) of the power swivel 10 (see FIG. 6) through which a parent rod is inserted, and the parent rod is connected to the rod chuck 10a (sixth
(see figure)) and the axis of the borehole are aligned and aligned in a straight line. The guide ring 3b is inserted into the C-shaped insertion hole 3c of the latch plate 3 together with the grip spring 3a of the latch plate 3.
This is to prevent the drill rod 9 from coming off outward. Also, the centering arm 29
When screwing the parent rod onto the drill pipe 9 loaded in the magazine 1 during rod addition work, and during rod recovery work, the upper end of the uppermost drill pipe is once grasped with the upper clamp 16, and the connecting part with the parent rod is attached. After loosening the screw, remove the upper clamp 1 from above.
This is used to remove all the screws by grasping the rod instead of 6, and will be explained in detail in the explanation of the rod addition and recovery work procedure of the rod magazine device, which will be described later based on FIGS. 11 and 12. .

To explain the operation of the rod magazine device of the present invention, that is, the procedure for adding and collecting rods, FIGS. 10b is the spindle of the power swivel 10 (not shown).
This is a parent rod that is inserted through the inside, and is a shorter version of the drill rod, with a length of about 1.5 m being used. 1
A slide table 8 has a power swivel 10 attached to the upper side via a hydraulic cylinder (not shown), and an upper clamp 16, which is a feature of the present invention, is fixed to the lower side. Reference numeral 8 denotes a guide frame on which the slide table 18 slides up and down, and a lower clamp 17 is fixed to the lower end. 11th
In Figure A, swing the rod magazine 1 forward to the operating position (attachment/detachment position) and power swivel 10.
(to the highest position), chuck the parent rod 10b, and close the centering arm 29.

Lower the slide table 18 a little in step B, and stop when the threaded portion of the parent rod 10b comes into contact with it. Ha,
Drive the power swivel 10 with the centering arm 29 closed to rotate the parent rod 10b to complete the screw connection. Open the centering arm 29 with D,
Raise the power swivel to 10 (to the highest level). In this state, the lower end of the drill rod 9 is pulled out of the recessed hole in the sheet plate of the magazine 1, so that the magazine 1 can swing. At E, the magazine 1 is swung to the rearward retracted position, and the drilling bit 32 is connected to the lower end of the drill rod 9. Then, dig one drill rod (at the bottom of the feed drive). Slide table 1
8 and the power swivel 10 to create a gap 18a for thread cutting.
8 and close the lower clamp 17. At step H, turn the parent rod 10b in the opposite direction and release the screw, and at step R, raise the power swivel 10 and return to the state at step A. By repeating the above operations, six drill rods 9 are supplied from the magazine 1 and drilled in this embodiment.

Figure 12 A to O show the procedure for rod recovery work. As shown in A, when the excavation is completed by excavating to a predetermined depth, the power swivel 10 is raised as shown in B (to raise the rod), and C. Close the lower clamp 17, open the rod chuck 10a and lower the power swivel 10 to the position shown, which is halfway up the uppermost drill rod 9, close the chuck 10a and reverse the rotation to loosen the lower screw. 2) Open the rod chuck 10a, raise the power swivel 10, and close the rod chuck 10a. At this time, a gap 18a for thread cutting is provided as in FIG. 11. Turn around and cut off the bottom screw. At F, the power swivel 10 is raised to shift the magazine 1 from the rear retracted position to the forward operating position. At this point, lower the power swivel 10 and insert the lower end of the drill rod 9 into the circular recessed hole in the sheet plate 2 of the magazine 1. on the upper clamp 1
6, turn it around and loosen the top screw. At this point, open the upper clamp 16 and the rod chuck 10a, raise the power swivel 10, then close the rod chuck 10a and close the centering arm 29. This operation is just a re-grabbing operation. After turning the screw in the opposite direction and cutting it off, raise the power swivel 10 to the highest position. Swing the rod magazine 1 to the rear retracted position with the power swivel 1.
0 downward, and stop when the tip of the threaded portion at the lower end of the parent rod 10b hits. , rotate the power swivel 10 in the normal direction, connect the screw, and
Open 7. From this state, return to operation B and repeat the above operations to obtain 6
The book drill rods 9 are collected and stored in the magazine 1.

As explained in detail above, according to the rod magazine device of the present invention, an upper clamp for screw breakout that reciprocates with the power swivel is provided below the rod chuck at the bottom of the power swivel, so that it penetrates the spindle of the power swivel. When breaking out the screw that connects the parent rod and the uppermost drill rod (see Figure 12),
Since the rod magazine does not receive the reaction force of breakout like in the past, there is no need to consider the torque resistance of the rod magazine, and the magazine only needs to be strong enough to hold, rotate and swing the drill rod, resulting in a lightweight structure. Become. Furthermore, there is no need for a special shape of the drill rod (eg, flats or hexagonal sections above and below the rod). Furthermore, since two or more additional drill rods can be loaded into the magazine and used, it is possible to save materials (conventional boring rods can be used), and other effects.

[Brief explanation of drawings]

Fig. 1 is a side view showing an example of a conventional rod magazine device, Fig. 2 is a sectional view taken along line C-C of the same, and Fig. 3 is a perspective view of the same conventional rod magazine device with the magazine attached to the hanger shaft. Fig. 4 is a perspective view of a drill rod used in a conventional rod magazine device, Fig. 5 is a perspective view showing another example of a conventional magazine, and Fig. 6A shows a rod magazine device according to an embodiment of the present invention. A front view of the crawler tower-mounted boring machine, FIG. 6B is a side view, FIG. 6C is a plan view, and FIG. 9 is a sectional view taken along the line A-A in FIG. 7, FIG. 9 is a sectional view taken along the line B-B in FIG. 7, FIG. 10 is a longitudinal sectional view of a rod magazine device showing an embodiment of the present invention, and FIG. FIGS. 12A to 12E are explanatory views of the rod adding work procedure using the rod magazine device of the present invention, and FIGS. 12A to 12E are explanatory views of the rod recovery work procedure. 1...Magazine, 2...Sheet plate, 2a...Circular recessed hole, 3...Latch plate, 3a...Grip spring, 3c...Insertion hole, 3d...Circular arc, 3e,
3f...Opening part, 4...Retainer, 6...Magazine shaft, 7...Hanger shaft, 8...
Guide frame, 8a...Chain, 9...Drill rod, 10...Power swivel, 10a...
Rod chuck, 11...Power unit, 16
... Upper clamp, 17 ... Lower clamp, 18
...Slide table, 18a...Gap, 2
3... Upper bracket, 24... Lower bracket, 28... Hydraulic cylinder, 28a... Piston rod, 29... Centering arm, 29
a...Show, 29b...Pin.

Claims (1)

[Claims] 1 A power swivel having a lower clamp attached to the lower end of the guide frame and a rod chuck at the lower part reciprocates along the guide frame, and a magazine for handling and storing at least one elongated rod pipe, which includes rotating means. a magazine shaft having a magazine shaft; a sheet plate mounted on the lower end of the magazine shaft and having a hole on its circumference corresponding to the lower end of the drill rod; The magazine is attached to the upper end of the magazine shaft and includes a latch having a hole on its circumference through which a substantially C-shaped drill rod that is open at its periphery is inserted, and the magazine is swingable around a hanger shaft that is attached to the guide frame. In the installed boring machine, an upper clamp that reciprocates with the power swivel is installed below the rod chuck at the bottom of the power swivel, and the seat plate of the magazine has a circular concave hole corresponding to the lower end of the drill rod, and the C of the latch plate is A letter-shaped insertion hole is formed by an opening having a width slightly larger than the outer diameter of the drill rod, and an arc that abuts against the outer circumference of the rod to position the rod, and the drill rod is partially inserted along the circular outer circumference of the latch plate. A guide link having a single opening and equipped with a hydraulic cylinder that operates a shoe that presses or releases the outside of the drill rod located in the opening is configured to be swingable together with the latch plate, and the magazine is attached to the front. A rod magazine device for a boring machine, characterized in that when the drill rod is swung in the direction, the drill rod located at the opening of the guide link is aligned with the rod attachment/detachment position, that is, the axis of the borehole.